Investigating Gravity Quick Check - Physical Science B U3L3

Which statement about gravity is correct?

Gravity is a force that attracts objects with mass toward each other.

Students analyze their data from a gravity experiment. They find that objects fall at a greater speed from a greater height than from a lower height. What can they conclude?

The longer an object falls, the more gravity increases its speed.

A student designs a gravity experiment. She will time how long it takes different objects to fall from her school's roof to the ground. She will use three objects: a 2-foot-long board, a toy car, and a paper bag. What is wrong with her experiment's design?

The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.

Which statement about mass is correct?

Mass is the measure of the amount of matter in an object.

A team of students performs an experiment to test the effect of gravity on different objects with the same mass. They measure how long it takes the objects to fall from the top of the school's bleachers. How can they insure they get accurate data?

by repeating the experiment several times